CAJ | 학술논문

车辆自组织网中车与车之间的状态信息收集需要周期性广播.随着网络中节点数目的增多,每个节点发送消息的数目会急剧增多,分组竞争加剧,导致高丢包率和较长接入时延.针对上述问题,本文通过给节点添加标号参数,减少车辆间非邻居节点的消息广播,从而控制节点发送消息的数目,以改进状态信息广播的收发机制,降低丢包率,缩短端到端平均传输时延.仿真结果表明,在高网络负载条件下,与原收发机制相比,平均丢包率减少了25.3%,平均竞争时延减少了27.4时隙.
차량자조직망중차여차지간적상태신식수집수요주기성엄파.수착망락중절점수목적증다,매개절점발송소식적수목회급극증다,분조경쟁가극,도치고주포솔화교장접입시연.침대상술문제,본문통과급절점첨가표호삼수,감소차량간비린거절점적소식엄파,종이공제절점발송소식적수목,이개진상태신식엄파적수발궤제,강저주포솔,축단단도단평균전수시연.방진결과표명,재고망락부재조건하,여원수발궤제상비,평균주포솔감소료25.3%,평균경쟁시연감소료27.4시극.
@@@@Communications among cars in VANET require broadcasting state information periodically. With the increase of the number of nodes ,the quantity of message sent from nodes increase rapidly,leading to higher packet loss rate and longer access delay. In order to solve the above problem, in this passage, we optimize the send and receive mechanism by adding indicator parameter of nodes to decrease the broadcast information among non-adjacent nodes and control the quantity of message sent and consequently lower packet loss rate and shorten end-to-end backoff delay. As shown in simulation results, in saturated network, the average packet loss rate and the competitive delay decrease by 25.3% and 27.4 slots, respectively.